Pressure and electric field effects on piezoelectric responses of KNbO3

Journal Article · Tue Sep 18 04:00:00 EDT 2012 · Journal of Applied Physics, 112(6):Article No. 064106

DOI:https://doi.org/10.1063/1.4752418· OSTI ID:1092665

Liang, Linyun; Li, Yulan; Xue, Fei; Chen, L. Q.

The dielectric and piezoelectric properties of a KNbO3 single crystal under applied hydrostatic pressure and positive bias electric field are investigated using phenomenological Landau-Ginzburg-Devonshire (LGD) thermodynamic theory. It is shown that the hydrostatic pressure effect on the dielectric and piezoelectric properties is similar to temperature, suggesting a common underlying mechanism for the piezoelectric anisotropy and its enhancement. The stable phase diagram of KNbO3 as a function of temperature and positive bias electric field is constructed. The maximum piezoelectric coefficient d33o* varying with temperature and electric field is calculated.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1092665
• Report Number(s): PNNL-SA-89993
• Journal Information: Journal of Applied Physics, 112(6):Article No. 064106, Journal Name: Journal of Applied Physics, 112(6):Article No. 064106
• Country of Publication: United States
• Language: English

Related Subjects

KNbO3
electric field effect
piezoelectric properties
pressure effect